Refrigerator shelf



FIG. 1 is a perspective view of a refrigerator shelf showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is an enlarged partial view of FIG. 1; and,

FIG. 9 is an enlarged partial view of FIG. 4. 

The ornamental design for a refrigerator shelf, as shown and described. 